Buy your kids Chalktrails for bikes and scooters to allow them to explore their creativity while having fun zipping around the neighborhood. It’s an ingenious but simple contraption with a chalk holder that connects to the center hub of the rear wheel using a wishbone clamp. There’s no electronics or complex gear mechanism involved. It’s just a rather large piece of chalk trailing behind on the ground behind the bike. Drive the bike or scooter, and a trail of colored chalk line is created in your wake. Drive in circles, create rectangles or squares, write out words, or just mess up the neighbor’s driveway with chalk scrawls. It’s easy as pie to install, and no tools are required. It can be adjusted to fit the rear wheel of any of the six standard bike sizes.